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| author | Sanjay Patel <spatel@rotateright.com> | 2015-09-02 19:06:43 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2015-09-02 19:06:43 +0000 |
| commit | a99ab1f5366100824241f410af9c32a434293f50 (patch) | |
| tree | 5fb6674bd0a6001cde411a14ae30271933bdefd2 /llvm/lib/Transforms/Utils/Local.cpp | |
| parent | 63fae0e58b66d7276651c9232b4d9442cce8fc41 (diff) | |
| download | llvm-a99ab1f5366100824241f410af9c32a434293f50.zip llvm-a99ab1f5366100824241f410af9c32a434293f50.tar.gz llvm-a99ab1f5366100824241f410af9c32a434293f50.tar.bz2 | |
add unpredictable metadata type for control flow
This patch defines 'unpredictable' metadata. This metadata can be used to signal to the optimizer
or backend that a branch or switch is unpredictable, and therefore, it's probably better to not
split a compound predicate into multiple branches such as in CodeGenPrepare::splitBranchCondition().
This was discussed in:
https://llvm.org/bugs/show_bug.cgi?id=23827
Dependent patches to alter codegen and expose this in clang to follow.
Differential Revision; http://reviews.llvm.org/D12341
llvm-svn: 246688
Diffstat (limited to 'llvm/lib/Transforms/Utils/Local.cpp')
0 files changed, 0 insertions, 0 deletions